The vape kits are usually composed of vape mod and atomizer. Inside the kit can be found even the battery(rarely), coils and other spare parts. For a beginner is recommended to purchase a vape kit instead to buy them separately. In this way, you know that you have the proper mod and atomizer depending on your type of vaping MTL or LI. Once you become experienced in the field and you have (at least) the intermediary knowledge then you should defiantly buy the parts separately for a unique and customized vaping experience.